Apparatus for absorbing a fixed quantity of gas by a liquid.



v e. BRAAM APPARATUS FOR ABSORBING A FIXED QUANTITY OF GAS BY A LIQUID.

APPLICATION FILED DEC. I. I917- 1;256,291. Patented Feb. 12,1918.

4 OI/E MQII .IA-A

PAEN

GEERT BRAAM, OF'ROTTERDAIVI, NETHERLANDS.

APPARATUS FOR ABSORBING A FIXED QUANTITY OF GAS BY A LIQUID.

Specification of Letters Patent.

Patented Feb. 12, 1918.

Application filed December 1, 1917. Serial No. 205,006.

To all whom it may concern:

Be it known that I, Gnnrrr BRAA u, a subjeC of the Queen of The Netherlands, re siding at 57 Julianalaan, Rotterdam, The Netherlands, have invented certain new and useful Improvements in Apparatus for Absorbing a Fixed Quantity of Gas by at Liquid, of which the following is a specification.

The invention relates to an apparatus for absorbing a fixed quantity of a gas by a liquid so that there is need for one absorption vat only without danger of loss of gas. Thus it is possible to obtain a fixed concentration of the gas in the liquid in the sim- .plest possible way.

When leading a gas into a liquid with the intention of absorbing a fixed quantity of the gas one is obliged in the usual processes to employ a continuous control of the process in order to fix the time when the gas supply should be stopped. Moreover such gases as are not very readily absorbed (and these are exactly the gases, with which the best results are obtained by the present invention) present the difficulty that in order to avoid losses, several absorption vats must be connected in series to absorb the gas which has not been taken up by the liquid in the first vat. This means an important impediment to the control over the concentration.

The apparatus according to the invention unites simplicity with the possibility of regulating the concentration to a degree of accu-- racy which completely satisfies any practical rcquirementsi The apparatus consists of two communicating vats of which one is the absorption vat and is filled at the beginning of the process with the absorbing liquid which can be agitated by rotating, shaking or the like, while the other vat, communicating with the first, serves in a way indicated hereinafter for the regulation of the. quantity of gas absorbed.

For this purpose the regulation vat is pro- .vided with a scale by which it is possible to -an apparatus according to the invention.

Therein 1 is a gas generator which is connected by the conduit 2 (consisting of course of a material which is not corroded by the gas) with the absorption drum 4, in which the liquid can be agitated, for instance by rota tlng, shaking or rocklng the drum, or by stirring the liquld. In the drawing the absorption drum is provided with pivots 5, car- The drum may be rotated ried in bearings (3.

7, S as indicated by a loose and fixed pulley in the drawing, or by hand.

The mixing of the liquid with the gas is drum, which is topmost when the drum is at rest. This presents the diiliculty that the connection between the gas conduit and the drum has to be broken before the rotation of the drum begins. This drawback is, however, often more than counterbalanced by certain advantages and moreover does not apply to rats which are shaken or rocked. This point will be set forth hereinafter.

The absorption drum 4 can be filled with the absorbing liquid through the inlet opening 9 which can be closed watertight; the drum may be emptied through the same opening (6. g. if the drum can be rotated around its axis) or-through any other opening provided for the purpose.

By the conduit 10 the drum is in communication with the regulation vat 11, which is provided with a scale on which the volume of the liquid in the vat maybe read. This arrangement of the vat 11 is such that the liquid displaced from 4: rises in 11 and flows back at the ratio in which the gas is absorbed in 4.

The scale 12 is so graduated, that its readings show directly the volume (under normal pressure) of the unabsorbed gas present in the absorber It, which unabsorbed gas forces a part of the liquid from 4 to ll. Hence in graduating the scale 12, it is necessary to take into account the pressure of the column of liquid in the vat 11 on the gas in 4.

The apparatus described above by way of an example works as follows:

After the drum 4; has been totally filled with the absorbing liquid the opening 9 is closed, while the connection between the absorption drum 4- and the regulation vat 11 remains open.

Now the valve in the gas supply pipe 3 is lime or .u-ndissolvt sired quantity of gas has been ledinto 4,

the gas supply is cutloff and the liquid in the absorption drum 4" is agitated; in the present instance by rotating the d um. lhe mixture is much promoted by periodically reversing the direction of rotation after every; two or three revolutions which reversion quay be practised by a simple alteration in tl'le gea-r. v I

As the gasis absorbed by the liquid in the absorption drum 4- the level of the liquid in lhe reguliatibn vat l'lfsink su hen-this vat is quite bmpty, all the gas letl, into 4. has 5 been absorbed and the quantity of gasabserbed byi thelliquid is known with s ulli cient accuracy or all practical p'urpjosesl' I The alteration .111 volume which! t-liejllqu'id undergoes by absorbing the gaslmey in most;

/ cases be neglected. M

In case it 1s desirable to the liquid absorb more than 1ts own volulnyeodi the as,

the process,described above is i e ieapedtill this object is attained,

It is self-evident that in leadii'ig the gas into the \at with the absorbil'rg liqu d part b gases,"-

ol the is at once dissolved. y; t v whose solubility, is such that it would too much influence 'the.accuuacy tolt the result,

this drawha'tflcinay be limitedto-a' minimum by leading tlie'gas not iu'to, but above the liquid, by arranging the gassupply at that pointmd ithefvat Whichisgat the tbp' when the is at rest; this is one a tnpse cases mentioned above in which theprqfits of a nopkcentral supply of the gas surpassthe drawbacks. Of course the prcssure, under lwlucp the gas is supplied to. the liquid,

shou' liq'uidtb'the regulation vat'which is located at a higher level than the absorpt ioh vat.

The apparatus described above is uor inslyqice very suitable for preparing jchldrid gla' e high enouglito force-a part-of the satedWvalergqf a fixed conc 'tration. ,The

ordinary solutions ,of cl"; orid of lime (bleaching powder), used if Laundries, have several drawbacks for ytllhebprresence of free n'jgrctlic'hts which iuj ure was-lied. Uhlorid'o'li lime the turtle as to lie -bleaching powder) has, however, the im- 7 piiktant ad vantage hat a solution of a prey dfitermined bleaching actionmay be easlly o tained. With the, apparatus accordingto presqntunvemtion chlorlnatedwvater of a predetermined eoncentration (and therefore with an act-um which may be accurately regulated can be easily prepared, while the objectilgnable properties of solutions prepared LP/(lm chlorid of lime are absent.

3 Haviilg now described my invention, what I claim as new. and desire to secure by Letters Patent, is r I 1; An apparatus for absorbing a fixed quantity of gas by a liquid, comprising the combination/of an absorption vat, provided with meansfor leading thereinto the gas to be absorbed, and with means for agitating flie liquiididuring the absorption of the gas,

- .yfi'tha' 1'egulation vat in open communication withsald absorption vat, which regula- ,jtioni vat is so arranged that the liquid, disiplaced from the absorption vat by the gas j'led thereinto, enters into the regulation vat and can be measured therein, while it flows back at a rate dependent uponthe speed with which the gas in the absorption vat is absorbed.

QJAln apparatus for absorbing a fixed quantity of gas by a liquid, comprising in combination, an absorption vat, which at that'p'bint which is on top when the vat is at rest, ,is provided with means/for leading 1 therejmto the gas to be absorbed and which isfui'ther provided with means for agitating th uid'during the absorption of the gas, a regulation vat in open communication ,itith said absorption vat, which regulation {to t is so arranged that the liquid, forced from theabsorption vatby the gas led thereinto, enters the regulation vat and can be measured therein, while it flows, back at a speed dependent upon the speed of absorp "ti on of the gas in theabsorption vat.

3. An a paratus" for absorbing a fixed quantity o, f g as by" a liquid, comprising an absorption vat, which at that point which is on top when the-'vatis at rest, is provided with Ineans for leading thereinto the gas to be absorbed and which" is further provided with means for 'a'gita'ting the liquid duringthe absorption of the gas, and a regulation vat in open communication with said absorption vat, which re llation vat is so arranged that the liquid 1;" rced ffbm the absorption vat by the gas ldd thereinto, enters the regulation vat and (ban be measured therein by a scale indicating directly the volume which the gas in the'absorption vat would have at.

ordinary pressure, the liquid flowing back into the absorption vat at a speed equal to theurate at which the gas ,in the absorption vat is absorbed.

In testimony whereof I affix my signature in presence of two witnesses. v

GEERT BRAAM. Witnesses:

PLANTE FIEBURE, H. Y. Konr. 

